Supercritical water as reaction media. Physical properties at supercritical conditions an overview
نویسندگان
چکیده
Supercritical water is favorable medium to carry out diverse reactions, specially focusing on “green chemistry” and environmental applications. The intermolecular structure of water due to hydrogen bond, in these conditions, varies and causes changes in its properties and the properties of its solutions. In order to be able to study the behavior of these solutions, to design hydrolysis and oxidation processes, corrosion of equipment as well as the design of new experiments, is necessary to know some physical properties or water in supercritical state. The review was made to know which are the equations of correlation and interpolation more suitable and accuracy to obtain different properties of supercritical fluids, applied to supercritical water. In this paper a brief discussion, correlation equation and limits of application for the dielectric constant, viscosity and ionic product are presented.
منابع مشابه
Supercritical water impregnation of CuO nanoparticles on silica-support as new catalyst
In our current study, supercritical water impregnation (SCWI) was introduced as a unique catalyst preparation method by employing the high diffusivity property of supercritical water. The method allows nano-particles to place on support surfaces in extremely dispersed conditions. The silica-based nanocatalyst granules for this purpose were prepared by initial impregnation of highly porous silic...
متن کاملProduction of Hydrogen and Synthesis gas via Cu-Ni/Al2O3 catalyzed gasification of bagasse in supercritical water media
Bagasse as a real biomass was converted to hydrogen rich gas via catalytic supercritical water gasification process. To find the effect of Cu on selectivity of products, Cu promoted Ni-γAl2O3 catalysts were prepared with 1 to 20wt% Ni and 0.5 to 10wt% Cu loadings via impregnation method. Catalysts were characterized by ICP, BET, XRD, H2 chemisorption and TEM technique as well CHNS analysis was ...
متن کاملSupercritical water impregnation of CuO nanoparticles on silica-support as new catalyst
In our current study, supercritical water impregnation (SCWI) was introduced as a unique catalyst preparation method by employing the high diffusivity property of supercritical water. The method allows nano-particles to place on support surfaces in extremely dispersed conditions. The silica-based nanocatalyst granules for this purpose were prepared by initial impregnation of highly porous silic...
متن کاملHydrogen rich gas production via nano-catalytic gasification of bagasse in supercritical water
Ru/Al2O3 nano-catalysts were prepared with impregnation and microemulsion techniques. The supercritical water gasification reaction was performed at 400oC and 5-60 min. Within the tested operation conditions, the reaction residence time of 15 min was the optimum to maximize the H2 yield. It was observed that using microemulsion technique increases the total gas yield significantly. Using microe...
متن کاملIonic Liquids Used as Reaction Media for the Synthesis of Organic Compounds: Characterization and Purification
Ionic Liquids are low melting salts (up to 100° C) and represent a new class of solvents with unusual physico-chemical properties. In the present work ionic liquids have been used as reaction media for the synthesis of phenylacetylphenylglycine and of phenylacetylphenylalanine. 3 ionic liquids: 1-Octyl-3-methylimidazolium tetrafluoroborate, 1-Butyl-3-methylimidazolium hexa fluorophosphate and 1...
متن کامل